路网提级改造工程最小分段长度的计算与确定

针对路网提级改造工程中,路线受穿越不同行政区域的沿线地形地貌以及地质条件影响的实际问题,提出了路网提级改造工程中采用分段设计的设计理念,并从驾驶认知心理、驾驶感受以及基于公路运营安全的路线评价等角度出发,对不同设计速度的段落,计算了分段最小长度。计算结果表明,路线安全性评价要求的路线分段长度远大于驾驶及车辆行驶要求的路线分段长度,实际工程中可以根据路线安全性评价要求确定路线分段最小长度。

Calculation and Determination of Minimum Segment Length in Upgrade Renovation Project of Road Network

In the upgrade renovation project of road network, the route passes through different administra tive regions. The route is impacted by the topography and geological conditions along the line, therefore it is put forward that using segment design concept in upgrade renovation project of road network, and the minimum length of segments with different design speed is calculated considering driving psychology, driving experience and route evaluation based on highway operation safety. The results show that the segment length which meets the require ment of route security evaluation is much longer than the length which meets the requirement of driving and vehi cle travel. In the actual project, the minimum length of route segment can be fixed on according to the route safe tv evaluation.